Problem solving

Solve SQL problems before opening the answer.

Pick a topic, write your query, compare the expected output, and reveal the answer only when you are ready. The set includes beginner query drills and exam-style topics inspired by the SQLD official scope.

Interactive problem list

Search, filter, and open complete SQL practice details.

Problems cover SELECT, WHERE, ORDER BY, GROUP BY, HAVING, JOIN, subqueries, NULL handling, set operators, and window functions. Answers stay hidden until you click the reveal button.

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